Iphone 4 battery replacement: your iphone 4 won't hold a charge? replace the battery on your iphone 4.. Learn how to check iphone battery health in 4 easy ways to find out if your iphone's battery needs to be serviced or replaced.. Learn about ios 11.3's new iphone battery health feature and how you can disable the battery performance throttling on your iphone..
Want to test the battery health of your iphone or ipad? we detail four simple ways to check the current health information of your device.. Apple will show the iphone's battery capacity relative to when you bought it new. apple explains: batteries will start at 100 percent when first activated and will have lower capacity as the battery chemically ages which may result in fewer hours of usage between charges.. This is 7. and it’s better than ever. view all the technical specifications and see what’s new on iphone 7 and iphone 7 plus..